Shock-absorber for starting mechanism.



APPLICATION FILED AUG- II, IBIS.

Patented Jan. 16, 1917.

A TTOR/VEV "ERIE s-a ROBERT REINER, 0F WEEHAWKEN HEIGHTS, NEW J SHOCK-ABSORBER FOB STARTING. MECHANISM.

Specification of Letters Patent.

Patented Jan. ;l lo, tart.

Application filed August 11, 1916. Serial No. 114,373.

To all whom it may concern Be it known that I, ROBERT Burner, citi- Zen of the United States of America, residing at Weehawken Heights, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Shock-Absorbers for Starting Mechanism, of which the following is a specification.

The present invention relates to e1nbroidering machines and more particularly to a shock absorber for the motion starting mechanism thereof and same consists in the construction, combination and arrangement of parts, as will be hereinafter fully described and set forth in the appended claims.

In the accompanying drawing, which forms part of this specification and in which similar reference characters denote corresponding parts, Figure 1 is a side elevation of a starting mechanism; Fig. 2 is a front view of the shock absorbing foot and Fig. 3 is a longitudinal section thereof.

Let the embroidering machine be represented by the driving gears a, b. The starting mechanism comprises a ratchet wheel 0 mounted on the shaft a of the gear a and operatively connected to the latter, and a crank arm d rotatively mounted on said shaft and carrying a pawl e which is adapted to cooperate with said ratchet wheel to feed the latter. The pawl is fulcrumed on the arm at at e and a special trigger-like mechanism is provided thereon for operating the pawl simultaneously with the lifting of the crank arm. This trigger mechanism comprises a rod 9 which extends longitudinally of the arm at and is movably mounted in sockets 7, f, projecting upwardly from said arm. The pawl e is provided on One of its side faces with a nose or block e arranged in linear extension of the rod 9 so that on the displacement of the latter, its inner end will strike against said block 6 and positively move the pawl into engagement with a tooth of the ratchet wheel 0, against the tension of a spring 72,, which is designed to normally clear the ratchet of the pawl. Fulcrumed in the outer end of the arm d, as at d, is a handle z, the upwardly projecting part a" of which carries a presser pin 2' adapted to cooperate with the forward end of the rod 9 to push the latter inwardly upon raising the handle. Projecting from the arm 03 is a piece d which serves as a stop for the handle 2' to limit the upward stroke thereof, so that on a further pull on the handle the arm (i will be swung upwardly carrying along with it the pawl' e which previously has been brought into engagement with theratchet wheel, and thereby feeding the latter. Q11 releasing the handle 2' the spring 71 will disengage the pawl e from the ratchet wheel 0 and the crank arm (Z will simultaneously sink into its initial position. The starting of the machine is effected by a fewup and down movements of the crank arm.

Since the attendant, while starting the machine, must at, the same time also watch the movements of the embroidering implements, the thread take ups,.etc., all of which are usually more than at arms length removed from the starting mechanism, he often carelessly or accidentally allows the crank arm to drop. Owing to the considerable weight of the arm, the latter often on striking the floor or machine frame is fractured. To prevent this, I provide a suitable foot or support which is equipped with a shock absorber.

In the present embodiment of my inven tion the support is in form of a tubular foot j which is provided with a base y" whereby it can be conveniently fixed to the frame of the machine, as by a screw 7' In the hollow part of said tube a helical spring 72 is mounted and in the mouth portion thereof a sleeve Z is secured in which is movably guided a rod m to the inner or lower end of which is secured a disk m resting on the spring is. The upper end of the rod has fixed to it or is formed integrally with a head or block m. Projecting from the free end of the arm cl is a pin or screw n in such a position that when the arm is allowed to drop it will strike against the block or head m of the spring actuated rod m, which will then act as a cushion or shock absorber.

It is, of course, understood that the structure may be variously modified without deviating from the principle of my invention and I, therefore, do not wish to restrict myself to the details described and shown.

What I claim and desire to secure by Letters Patent is:

1. In a motion starting mechanism, the combination with a freely swinging crank arm, of a shock absorbing support therefor, consisting of a tubular foot and a member movably and resiliently guided therein.

2. In an embroidering machine, the combination with a freely swinging motion starting arm, of a movable resiliently sup" member, means movably and resiliently guided in said member and means on said arm so positioned as to strike the said first 15 named means when said arm is dropped from its operative position.

In testimony whereof I afiix my signature in presence of two witnesses.

ROBERT REINER.

Witnesses:

CARL G. A. SonUMANN, ANNETTE E. AI-IL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

